include/uapi/linux/kexec.h

   1 #ifndef _UAPILINUX_KEXEC_H
   2 #define _UAPILINUX_KEXEC_H
   3
   4 /* kexec system call -  It loads the new kernel to boot into.
   5  * kexec does not sync, or unmount filesystems so if you need
   6  * that to happen you need to do that yourself.
   7  */
   8
   9 #include <linux/types.h>
  10
  11 /* kexec flags for different usage scenarios */
  12 #define KEXEC_ON_CRASH          0x00000001
  13 #define KEXEC_PRESERVE_CONTEXT  0x00000002
  14 #define KEXEC_ARCH_MASK         0xffff0000
  15
  16 /*
  17  * Kexec file load interface flags.
  18  * KEXEC_FILE_UNLOAD : Unload already loaded kexec/kdump image.
  19  * KEXEC_FILE_ON_CRASH : Load/unload operation belongs to kdump image.
  20  * KEXEC_FILE_NO_INITRAMFS : No initramfs is being loaded. Ignore the initrd
  21  *                           fd field.
  22  */
  23 #define KEXEC_FILE_UNLOAD       0x00000001
  24 #define KEXEC_FILE_ON_CRASH     0x00000002
  25 #define KEXEC_FILE_NO_INITRAMFS 0x00000004
  26
  27 /* These values match the ELF architecture values.
  28  * Unless there is a good reason that should continue to be the case.
  29  */
  30 #define KEXEC_ARCH_DEFAULT ( 0 << 16)
  31 #define KEXEC_ARCH_386     ( 3 << 16)
  32 #define KEXEC_ARCH_68K     ( 4 << 16)
  33 #define KEXEC_ARCH_X86_64  (62 << 16)
  34 #define KEXEC_ARCH_PPC     (20 << 16)
  35 #define KEXEC_ARCH_PPC64   (21 << 16)
  36 #define KEXEC_ARCH_IA_64   (50 << 16)
  37 #define KEXEC_ARCH_ARM     (40 << 16)
  38 #define KEXEC_ARCH_S390    (22 << 16)
  39 #define KEXEC_ARCH_SH      (42 << 16)
  40 #define KEXEC_ARCH_MIPS_LE (10 << 16)
  41 #define KEXEC_ARCH_MIPS    ( 8 << 16)
  42 #define KEXEC_ARCH_AARCH64 (183 << 16)
  43
  44 /* The artificial cap on the number of segments passed to kexec_load. */
  45 #define KEXEC_SEGMENT_MAX 16
  46
  47 #ifndef __KERNEL__
  48 /*
  49  * This structure is used to hold the arguments that are used when
  50  * loading  kernel binaries.
  51  */
  52 struct kexec_segment {
  53         const void *buf;
  54         size_t bufsz;
  55         const void *mem;
  56         size_t memsz;
  57 };
  58
  59 #endif /* __KERNEL__ */
  60
  61 #endif /* _UAPILINUX_KEXEC_H */